---
title: WKWebExtension.Error.Code.unsupportedManifestVersion
framework: webkit
role: symbol
role_heading: Case
path: webkit/wkwebextension/error/code/unsupportedmanifestversion
---

# WKWebExtension.Error.Code.unsupportedManifestVersion

Indicates that the manifest version is not supported.

## Declaration

```swift
case unsupportedManifestVersion
```